“…1d), 12,13 but the degree to which these probes are optimally selective for CL relative to PG is not clear. 13,[18][19][20][21][22][23] Engineering selectivity into a molecular probe requires manipulation of the structure and physicochemical properties to stabilize favorable interactions with CL relative to other phospholipids, in particular, its chemically similar precursor PG. Due to the structural similarity of the two lipids, the design process must exploit the subtle differences in binding affinity mediated by the existence of two phosphate groups due to the four-acyl chain structure of CL relative to its two-acyl chain PG competitor.…”